Coronal microleakage of endodontically treated teeth with intracanal post
exposed to fresh human saliva |
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Authors: | Simone Gomes dias de OLIVEIRA Denise Jornada GOMES Marcelo Hissé das Neves COSTA Ezilmara Rolim de SOUSA Rafael Guerra LUND |
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Institution: | 1.Laboratory of Microbiology, School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil.;2.Private practice, Santiago, RS, Brazil.;3.Private practice, Arroio Grande, RS, Brazil.;4.Department of Semiology and Clinics, Laboratory of Microbiology, School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil.;5.Department of Restorative Dentistry, Laboratory of Microbiology, School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil. |
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Abstract: | ObjectiveThe aim of this study was to investigate the coronal microleakage of
endodontically treated teeth prepared to receive an intracanal post and teeth with
an intracanal post but without a prosthetic crown and exposed to contamination by
fresh human saliva.Material and MethodsA mechanical-chemical preparation following the step-back technique was carried
out in 35 extracted single-rooted human teeth. The teeth were randomly divided
into five groups: G1=root canals instrumented, obturated, and prepared to receive
an intracanal post (N=10); G2=root canals with cemented posts but without coronal
sealing (N=10); PC1=positive control root canals instrumented and open (N=5);
PC2=positive control 2 root canals without instrumentation and open (N=5); and
NC=negative control healthy teeth (N=5). The crowns were removed except for the
control group of intact teeth. The root canals were obturated and sterilized with
cobalt 60 gamma irradiation and were then adapted in an apparatus using a Brain
Heart Infusion (BHI) medium and fresh human saliva for contamination. Microbial
growth was indicated by the presence of turbidity in the BHI liquid medium.ResultsData were submitted to the Kaplan-Meier Survival Analysis and the Holm-Sidak
statistic method, which observed an index of 90% of microleakage in root canals
after 24 hours for G1 and 70% of microleakage in samples at the end of 40 days for
G2.ConclusionThe results show that root canals with an intracanal post but without a prosthetic
crown can be recontaminated when exposed to fresh human saliva in a short
period. |
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Keywords: | Endodontics Saliva Post and core technique Dental leakage Root canal |
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